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| Analysis of AOD Top Lance Blowing Process at Baosteel |
| LI Donggang,CHI Hebing,SHAO Shijie |
| Melting Shop of Stainless Steel Branch, Baosteel Corp., Shanghai 200431, China |
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Abstract It was shown that during AOD refining with side and top blowing the decarburization speed was slower, the oxidation of chromium was a little bit severer and the bath heating rate was slower than expected.Thus， based on the simulation results, the oneoutlet top lance was replaced with three outlet lances.The one outlet lance,threeoutlet top lance with 11 degree inclination of outlets and three outlet top lance with 15 degree inclination were compared in terms of decarburization speed,chromium oxidation rate and bath temperature heating rate. The results showed: 1) With reasonable lance position, the three outlet top lance with 11 degree inclination is the most effective; 2) The one outlet top lance is the worst one; 3) The three outlet top lance with 15 degree inclination is not satisfactory due to unfavorable gas streams.
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Received: 01 January 1900
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2008, Vol. 43 
